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Artificial disc replacements with natural kinematics

Abstract: This invention improves upon prior aft total disc replacements (TDRs) by more closely replicating the kinematics of a natural disc. The preferred embodiments feature two or more fixed centers of rotation (CORs) and an optional variable COR (VCOR) as the artificial disk replacement (ADR) translates from a fixed posterior COR that lies posterior to the COR of the TDR to facilitate normal disc motion. The use of two or more CORs allows more flexion and more extension than permitted by the facet joints and the artificial facet (AF). AF joint-like components may also be incorporated into the design to restrict excessive translation, rotation, and/or lateral bending. ...

USPTO Applicaton #: #20050228497 - Class: 623017110 (USPTO) - Class 623

Related Patent Categories: Prosthesis (i.e., Artificial Body Members), Parts Thereof, Or Aids And Accessories Therefor, Implantable Prosthesis, Bone, Spine Bone
The Patent Description & Claims data below is from USPTO Patent Application 20050228497, Artificial disc replacements with natural kinematics.

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